A sum of money worth £13 consists of an equal number of coins worth 50 pence : 20 pence and 10 pence. How many coins of each kind are there?
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Let xx =the number of coins of each kind. Then
50x+20x+10x=130050x+20x+10x=1300
80x=130080x=1300
x=16.25x=16.25
Since xx is integer, then the problem has no answer.
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